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Homework Help: Torque - Finding the unknown weight

  1. Dec 4, 2007 #1
    1. The problem statement, all variables and given/known data
    Torque is used to determine the weight of an object. A 10.0 m long pole weighing 20.0 N has its center of gravity 2.00 m from one end. An object of unknown weight is hung at the end opposite the center of gravity. With the object hanging at this end, the pole now balances 2.00 m from the unknown weight. What is the weight of the unknown weight? Ans:60.0


    2. Relevant equations
    T = F * R


    3. The attempt at a solution
    T = 20 * 2
    = 40 ?

    :(
     
  2. jcsd
  3. Dec 4, 2007 #2
    oh please anyone? my exams tommorow? im sorry for being so naggy? any help AT ALL will be great. anything. Ive been staring at this screen refreshing every 5 seconds.
     
  4. Dec 4, 2007 #3
    PLeASE IM BeGGING YoUUUUUUUUUUUUUUUUUUUUUUUUUU
     
  5. Dec 4, 2007 #4
    Ok lemme have a crack at it.I assume that unknown object is at the other end of stick (not the center of gravity end). So

    Tcw = Tccw
    2*X = 6*20
    X=60 N
     
  6. Dec 4, 2007 #5
    Thank you so much. So, SO much. I love you. In a non-gay way. <3
     
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